AMPHARETE ACUTIFRONS. 



67 



1894. 

 1895. 



1896. 

 1897. 



1901. 

 1907. 

 1909. 

 1910. 



}) 

 1912. 

 1914. 



1915. 

 1917. 



Am]. 



harete Grubei, Bidenkap. Christ. Vet.-Akad. Forhandl., p. 122. 



„ Fanvel. Bull. Soc. Linn. Normand., t. ix, pp. 329 — 348. 

 „ idem. Mem. Soc. Nat., etc., Cherbourg, t. xxix, p. 340. 

 „ idem. Bull. Soc. Linn. Normand., 4 e ser., vol. x, p. 70. 

 „ Michaelsen. Polych. deutsch. Meere, p. 162. 

 „ Fauvel. Bull. Sc. de Fr. et Belg., t. xxx, p. 289, pis. xv— xxiv. 

 „ Whiteaves. Mar. Invert. E. Canada, p. 74. 

 Fauvel. Bull. Inst. Ocean., No. 107, p. 32. 

 „ idem. Ann. Sc. nat., 9 e ser., t. x, p. 209. 

 „ Southern. Proc. Koy. Irish Acad., vol. xxviii, p. 239. 

 „ Skorikow. St. Petersb. Mus. Zool. Ann., xv, p. 233. 

 ,, Wollebfek. Skriv. Vid.-selsk. Krist., No. 18, p. 50, pi. x, fig. 6. 

 „ Southern. Proc. Koy. Irish Acad., vol. xxxi, No. 47, p. 129. 

 „ Fauvel. Campag. Scient. Monaco, Fasc. xlvi, p. 282. 

 „ Mcintosh. Ann. Nat. Hist., ser. 8, vol. xiii, p. 96. 

 „ Ditlevsen. Polych. Annel. (Meddel. Gr^nl.), p. 720. 

 „ Southern. Irish Sc. Invest., No. 3, p. 47. 

 acutifrons, Hessle. Zool. Bidr. Uppsala, No. 5, p. 96. 



Habitat. — Not uncommon in 80 — 100 fathoms in St. Magnus Bay, Shetland, where it 

 was first dredged by Dr. Gwyn Jeffreys in 1867; in 20 to 40 fathoms in Dingle Bay, and 

 at Bundoran, Donegal Bay, in the "Porcupine" Expedition of 1869. Large examples 

 were procured in the stomach of the cod and haddock off St. Andrews Bay (E. M.) ; 

 dredged off the coast of Durham (Prof. G. S. Brady) ; dredged in 11 fathoms amongst 

 tangle-roots in Bressay Sound (W. C. M.) ; Irish Sea (Hornell), Lambay, Dublin, 

 Blacksod and Clew Bays (Southern). 



It occurs elsewhere in the Channel, Cattegat, Atlantic ; Spitzbergen, Greenland, 

 Sweden (Malmgren, Marenzeller, etc.), Nova Zembla and the Kara Sea (Theel). Extends 

 to Canada, where it was dredged by Dr. Whiteaves in 220 fathoms, between Anticosti and 

 the south shore. Siberian and Behring's Seas (Wiren). Kiel (Mobius). 



The cephalic lobe (Plate CXVI, fig. 8) is, as Fauvel describes, more or less pentagonal, 

 the two anterior lines of the pentagon sloping obliquely forward and inward so as to 

 make a blunt cone. At the posterior border of this region is on each side a minute eye, 

 generally indistinct in spirit-preparations. 



The buccal segment is narrow and bears inferiorly the buccal tentacles, which Fauvel 

 frequently found in life in the mouth. The tentacles taper from base to apex, which in 

 the preparations is often slightly enlarged. 



The base of each is smooth, then small papilla appear laterally, and increase in 

 length in the slender distal region of the organ, the tip, however, being bare. A typical 

 papilla is a translucent, cylindrical process of the hypoderm covered with cuticle, and 

 having microscopic palpocils at the tip, the space between the rows of papillas being 

 ciliated, whilst the convex dorsal surface has palpocils, and their cavities communicate 

 with the coelomic space (Fauvel). In structure these papillae thus differ from those of 

 Sabellides, which have the internal axis. 



The mouth has, when closed, a puckered margin with a conical anterior fold, the 

 tentacles with their plate of insertion being drawn inward, the parts in their respective 



